weschler instruments Power Series Plus 2493 User manual

Power Series Plus
Digital Switchboard Meters
www.weschler.com800-557-0064 [e-mail]
Power System
Measurements
Made in U.S.A.

2
The POWER SERIESPlus digital switchboard meter was developed by Yokogawa Corporation of America to
provide customers with a versatile AC digital power meter. The heart of the POWER SERIESPlus meter
incorporates the latest DSP microprocessor technology. Careful and thoughtful design has resulted in a family of
user-friendly, field-adjustable meters. The design of the POWER SERIESPlus combines a high accuracy digital
switchboard meter with transducer output which can be configured in the field by an end-user, or when installed
in new electrical equipment by an OEM. It eliminates requirements for a large inventory of dedicated instruments,
and provides flexibility when new panel designs or system upgrades require changes in instrument transformer
ratings. Our rugged metal case fits standard panel cutouts for switchboard meters and makes it a perfect
replacement for less versatile instruments. The RS-485 communications option allows up to 32 meters to be
networked together for remote monitoring and control. In addition, the POWER SERIESPlus can be set up and
locked out for security via the remote communications option.
The 2493 triple display multifunction power meter...
Ideally designed for easy retrofit into existing switchboard meter panel cutouts.
The 2493 features three easy to read LED displays, minimum/maximum values at
the touch of a button, scaling up to 9999. Optional 0-1mA DC and 4-20mA DC
analog outputs are configurable by the user.
Features
• Scaling of the instrument for PT (potential transformer) primary ratings up to 9999;
and CT (current transformer) primary ratings up to 9999.
• Adjustable transducer output proportionate to the primary input setting.
• Display average setting: Adjustable to obtain a “rolling average” of inputs. Increasing the number of
samples reduces annoying “digit bounce” by the least significant digit.
• All settings are stored in non-volatile memory. If there is a loss of power to the instrument, all
settings will remain as they were prior to power loss.
• Accuracy of ±0.2% of reading, ± 0.1% of full scale.
• True RMS current and voltage measuring capability. A most desirable feature when distorted
wave forms are present on the line.
• High resolution/ high intensity LED displays that can be viewed from almost any angle.
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
3
Set-up and Configuration (2491, 2492)
The POWER SERIESPlus
can be configured for primary and secondary transformer inputs, legends, outputs
and averaging function. At Weschler, we program each model according to the specified options required by the
user. This minimizes the number of steps to set up the instrument at the job site or on the factory floor.
Each model is programmed only for the options selected, so there are no unnecessary menu items. If you select
a Voltmeter without analog output, then set up will be limited to PT ratios, LED display, and average setting.
All can be accomplished in less than one minute. If no transformer is required, the ratio entered for PT P and
PT S is 1 (1:1).
Set up functions appear on the display as symbols. They are accessible when you press the MODE pushbutton
located behind the front cover and beneath the LED display. After pressing MODE, you are in the setting mode
“rSET” and can begin setting up. Error codes during set up mean your inputs may be incorrect or outside of the
range of the instrument. Refer to the instruction manual for range/span restrictions for each model selected.
The pushbutton setting switches are described below. In order for a setting to be entered into memory, you
must complete all entries for that mode such as: “PT P” and “PT S” (PT primary and PT secondary). If the values
do not need to be changed from a previous setting, simply push the EN switch several times to go to the next
mode.
After auxiliary power connection and removal of the cover, the instruction manual will guide you through set up.
Pushbutton switches are located directly below the LED display. The POWER SERIESPlus
can be set up
before, or after installation in a panel. Once set up is complete, replace the cover and make the appropriate input
connections.
PUSHBUTTON SETTING SWITCHES
(under the cover)
Mode switch transfers user
back and forth between
standard mode (present
setting) and “rSET” mode.
After each setting,this
switch enters input
data, then proceeds
to next sequence.
This switch moves
from one unit setting
to another, or mode
to mode
This switch moves
digits to selected
values and moves
decimal position.
Mode EN

4
Set-up and Configuration (2493)
The new triple display POWER SERIESPlus
has front panel pushbuttons which can be used for setting voltage
and current inputs from instrument transformers, as well as analog outputs and a rolling average. The exact
functions depend on the model options selected by the customer. For example: If you selected a 3 in 1 Voltmeter
with no analog output, you would only need to set the PT ratio and average. If you are tied into a network with
RS485, then you would also need to identify the network address and baud rate.
All set-up functions can be performed using the four buttons on the front panel (see below). You can also use
the buttons to display the minimum and maximum readings and, on some models, to change from phase to
phase.
All button operations begin with the Mode button. To see the Min or Max, push the Mode button and then the
button of the reading you want to see - Min or Max. The values will display for 10 seconds before reverting to the
normal display. If you want to reset the values, push the Min or Max button again before 10 seconds have
passed.
If the model that you select can change between phases, it is done by pressing the Mode button first,
and then the Next button. The display will switch to the next phase in the sequence. For example: A
Volt-Amp-Hertz meter with 3P4W connections would cycle A-B-C-AB-BC-CA and then back to A. To view the
configuration settings, press Mode twice (Mode-Mode) and then press Set. The first setting will be displayed.
For a Triple Amp meter this setting will be the Current Transformer (Ct), for all other models this will be the
Potential Transformer (Pt). To see the other settings, press Next. You can scroll through all the settings by
pressing Next. To go back to normal operations, press Mode. To change the setting being shown, press Set.
See the above paragraphs on the specific settings for details. Once a setting is changed it will display the next
setting. At any point while changing settings, pressing Mode will exit without changing anything.
PUSHBUTTON SETTING SWITCHES
(front panel)
This button starts all
operations. When viewing
or changing settings it is
used to back out of a mode.
This button, when
viewing or changing
settings, is used to select
a mode, save it, and
then move to the next
mode in the sequence. It
is also used to display
Min readings.
This button can change
the phase being
displayed. When viewing
or changing settings, it
moves between settings
or between digits.
This button will
increment the value
being changed. It is
also used to display
Max readings.
Mode Next Inc
Max
Set
Min
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
5
MEASURING
CAPABILITY
MODEL
NUMBER
CONNECTION
AVAILABLE*
MAXIMUM
INPUT RATING
ELECTRICAL
LEGEND
ORDER
INFO.
DC VOLT
2491-25 0-600V DC Volts Page 7
AC AMPERES
2491-11
2493-05
Single phase
Three phase
0-1/0-5 Amp AC
0-1/0-5 Amp AC
Amps AC/Kiloamps AC
Amps/Kiloamps
Page 8
Page 16
AC VOLTAGE
2491-21
2493-01
2493-02
Single phase
3P3W Delta
3P4W Wye
0-150/300/600 Volt AC
0-150/300/600 Volt AC
0-150/300/600 Volt AC
Volts AC/Kilovolts AC
Volts/Kilovolts
Page 8
Page 1 6
FREQUENCY
2491-81 Single phase 150/300/600 Volt AC Hertz Page
8
WATTS
2491-51
2491-52
2491-53
2491-54
2491-55
1P2W
1P3W
3P3W
3P4W (2 1/2 Element)
3P4W (3 Element)
(select one)
120V/240V/480V AC 1 Amp
120V/240V/480V AC 5 Amp
Watts
Kilowatts
Megawatts Page 9
VARS
2491-61
2491-62
2491-63
2491-64
2491-65
1P2W
1P3W
3P3W
3P4W (2 1/2 Element)
3P4W (3 Element)
(select one)
120V/240V/480V AC 1 Amp
120V/240V/480V AC 5 Amp
Vars
Kilovars
Megavars
Page 9
POWER FACTOR
2491-71
2491-72
2491-73
2491-74
2491-75
1P2W
1P3W
3P3W
3P4W (2 1/2 Element)
3P4W (3 Element)
(select one)
120V/240V/480V AC 1 Amp
120V/240V/480V AC 5 Amp
Power Factor
Lag
Lead
Page 1 0
PHASE ANGLE
2491-91
2491-92
2491-93
2491-94
2491-95
1P2W
1P3W
3P3W
3P4W (2 1/2 Element)
3P4W (3 Element)
(select one)
120V/240V/480V AC 1 Amp
120V/240V/480V AC 5 Amp
Phase Angle
Lag
Lead
Page 1 0
VOLT / AMP
DUAL FUNCTION
2492-12 Single phase 150V/300V/600V 1 Amp
150V/300V/600V 5 Amp
Volts
Kilovolts
Amps
Kiloamps
Page 1 1
VOLT / HERTZ
DUAL FUNCTION
2492-22 Single phase 150V/300V/600V & 50/60Hz
150V/300V/600V & 400Hz
Volts
Kilovolts
Hertz
Page 1 2
VOLT / AMP / Hz
2493-07
2493-08
2493-09
1P2W
3P3W Delta
3P4W Wye
(select one)
150V/300V/600V AC
1A or 5A AC
50/60Hz or 400Hz
Amps/Kiloamps
Volts
Kilovolts
Hertz
Page 1 7
WATT / VAR
DUAL FUNCTION
2492-40
2492-41
2492-42
2492-43
2492-44
1P2W
1P3W
3P3W
3P4W (2 1/2 Element)
3P4W (3 Element)
(select one)
120V/240V/480V AC 1 AMP
120V/240V/480V AC 5 AMP
Watts/Kilowatts
Megawatts
Vars/Kilovars
Megavars
Page 1 3
WATT / PF
DUAL FUNCTION
2492-45
2492-46
2492-47
2492-48
2492-49
1P2W
1P3W
3P3W
3P4W(2 1/2 Element)
3P4W(3 Element)
(select one)
120V/240V/480V AC 1 AMP
120V/240V/480V AC 5 AMP
Watts
Kilowatts
Megawatts
Power Factor
Lag Lead
Page 1 4
WATT / VAR / PF
2493-34
2493-35
2493-36
2493-37
2493-38
1P2W
1P3W
3P3W
3P4W(2 1/2 Element)
3P4W(3 Element)
(select one)
120V/240V/480V AC 1 AMP
120V/240V/480V AC 5 AMP
Watts/Vars
Kilowatts/Kilovars
Megawatts/Megavars
Power Factor
Lag Lead
Page 1 5
Model Types and Rated Inputs
*see pages 18through 22for connection diagrams

6
DISPLAY
Type
Digit height
Response time
4 digit red LED (9999 counts) for 2493 readouts (3 displays)
4 1/2 digit red LED for 2491, 2492
0.56 inch or 14mm
250ms min. update time for V/V/V, A/A/A, 2491 and 2492
Less than 500ms min. update time for V/A/Hz, Watt/VAR/PF 2493
AUXILIARY POWER
120V or 240V AC (+/- 15%), 45-65 Hz, 4.5VA max.
or select 24, 48, 125V DC
INPUT RATING
Current:
Voltage:
Frequency
0 to 1 A AC; 0 to 5A AC
0-120V AC; 0-240V AC, 0-480V AC (W/VAR/PF/PA)
0-150V AC; 0-300V AC; 0-600V AC (Volt/Freq)
0-150V DC; 0-300V DC; 0-600V DC
50/60 Hz and 400 Hz (only V/A/Hz units)
INPUT RANGE
Rated Current:
Rated Voltage:
A/W/VAR: 0-200%; PF/PA: 20-200%
V/W/VAR: 0-120%; PF/PA: 50-120%; Frequency: 20-120%
INPUT FREQUENCY
RANGE
Volts, Amps, Hertz 45-65 Hz up to the 9th harmonic measuring capability
±2% of specified accuracy
SUSTAINED INPUT
Rated Current:
Rated Voltage:
A/W/VAR/PF/PA: 200% continuous; 10x rating for 5 seconds
V/W/VAR/FREQ: 120% continuous; PF/PA: 150% continuous
BURDEN
Current:
Voltage:
<0.2 VA per element
<0.2 VA per element; 240V: <0.4VA per element
ACCURACY
Reference condition:
25℃, 45-74%RH, at rated
input 60 Hz sine wave,
30 min. warmup
Voltage
Current +/- 0.2% of reading +/- 0.1% of full scale
Watt/VAR
Power Factor +/- 0.05 Power Factor
Phase Angel +/- 0.5° Phase Angle
Frequency +/- 0.1 Hz @ 40-70 Hz, +/- 0.5 Hz @ 300-500 Hz
ANALOG OUTPUT
AND RESPONSE
TIME
0 to 1 mA, 4 to 20 mA,
12+/-8 mA
10V DC compliance into 10k ohm load maximum;15V DC compliance into 750 ohm max.
1 second maximum response time within ±1% of final value
16 bit resolution; accuracy 0.4% of span
OUTPUT RIPPLE
0.5% peak-to-peak maximum of output span
COMMUNICATIONS
RS-485 half duplex interface with networking up to 32 units
Selectable Baud Rate
ISOLATION VOLTAGE
AND INSULATION
RESISTANCE
Input to output/case:
Aux. power to case:
Aux. power to output:
Output to case:
2500V AC for 1 minute / more than 10 Megohm @ 500V DC
2000V AC for 1 minute / more than 10 Megohm @ 500V DC
DC: 500V DC minimum / 10 Megohm minimum @100V DC
AC: 2000V AC for 1 minute / more than 10 Megohm @ 500V DC
DC: 500V DC minimum / 10 Megohm minimum @ 100V DC
1000V AC for 1 minute . more than 10 Megohm @ 500V DC
TEMPERATURE
RANGE
Operating:
Storage:
-20 to +60℃ at 90% RH maximum (non-condensing)
-40 to +85℃
TEMPERATURE
COEFFICIENT
Display and Comm:
Analog Output:
±150 PPM/℃ maximum of full scale
±250 PPM/℃ maximum of full scale
INFLUENCE OF:
Magnetic field:
Input voltage:
Influence of:
Unbalanced current:
Input frequency:
Load resistance:
(Analog input)
0.5% maximum at 400 ampere turns/meter
<0.05 Power Factor (10-120% of rated voltage)
Shock/Vibration: per ANSI C39.1
<0.2% of full scale
<0.05 Power Factor (45-65 Hz)
0 to 1 mA: 0-10K ohm within ±0.05% of full scale
4 to 20 mA, 12 ± 8 mA: 0-750 ohm within ±0.05% of full scale
DIMENSIONS:
WEIGHT:
W x D x H = 4.33 x 6.54 x 4.33 inches
1000g (2.2 lbs) or less
General Specifications
Power Series Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
7
DC VOLTS
MODEL FORMAT: 2491
Insert model code from the selection below:
MODEL 2491
1. FUNCTION
-25 DC VOLTS
2. INPUT RATING
-57 150V DC
-67 300V DC
-77 600V DC
3. FREQUENCY
-0 NONE
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
4. ANALOG OUTPUT
-AAA NO OUTPUT
-AFA 0 to 1 mA DC
-AHD 4 to 20 mA DC
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.

8
AC AMPS / AC VOLTS / FREQUENCY
MODEL FORMAT: 2491
Insert model code from the selection below:
MODEL 2491
1. FUNCTION
-11 AMP AC
-21 VOLTS AC
-81 FREQUENCY
2. INPUT RATING
-01 1 AMP
-05 5 AMP
-10 150V
-20 300V
-30 600V
3. FREQUENCY
-1 50/60 Hz
-2 400 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NO OUTPUT
-AFA 0 to 1 mA
-AHD 4 to 20 mA
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
9
AC WATTS AND VARS
MODEL FORMAT: 2491
Insert model code from the selection below:
MODEL 2491
1. FUNCTION/
CONNECTIONS
-51 WATT 1P2W
-52 WATT 1P3W
-53 WATT 3P3W
-54 WATT 3P4W
(2 1/2 element)
-55 WATT 3P4W
(3 element)
-61 VARS 1P2W
-62 VARS 1P3W
-63 VARS 3P3W
-64 VARS 3P4W
(2 1/2 element)
-65 VARS 3P4W
(3 element)
2. INPUT RATING
-11 120 VOLT / 1 AMP
-15 120 VOLT / 5 AMP
-21 240 VOLT / 1 AMP
-25 240 VOLT / 5 AMP
-31 480V / 1 AMP
-35 480V / 5 AMP
3. FREQUENCY
-1 50/60 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NO OUTPUT
-AFA 0 to 1 mA
-AHD 4 to 20 mA
-AHF 12 ± 8 mA
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.

10
POWER FACTOR AND PHASE ANGLE
MODEL FORMAT: 2491
Insert model code from the selection below:
MODEL 2491
1. FUNCTION/
CONNECTIONS
-71 POWER
FACTOR 1P2W
-72 POWER
FACTOR 1P3W
-73 POWER
FACTOR 3P3W
-74 POWER
FACTOR 3P4W
(2 1/2 element)
-75 POWER
FACTOR 3P4W
(3 element)
-91 PHASE ANGLE
1P2W
-92 PHASE ANGLE
1P3W
-93 PHASE ANGLE
3P3W
-94 PHASE ANGLE
3P4W
(2 1/2 element)
-95 PHASE ANGLE
3P4W
(3 element)
2. AC INPUT RATING
-11 120 VOLT / 1 AMP
-15 120 VOLT / 5 AMP
-21 240 VOLT / 1 AMP
-25 240 VOLT / 5 AMP
-31 480 VOLT / 1 AMP
-35 480 VOLT / 5 AMP
3. FREQUENCY
-1 50/60 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA No Output
-AFA 0 to 1 mA
-AHD 4 to 20 mA
-AHF 12 ± 8 mA
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
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Digital Switchboard Meters

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Digital Switchboard Meters
11
AC VOLT / AMP DUAL FUNCTION
MODEL FORMAT: 2492
Insert model code from the selection below:
MODEL 2492
1. INPUT RATING
-12 VOLT / AMP AC
2. RATING CODE
-51 150V AC / 1 AMP
-61 300V AC / 1 AMP
-71 600V AC / 1 AMP
-55 150V AC / 5 AMP
-65 300V AC / 5 AMP
-75 600V AC / 5 AMP
3. FREQUENCY
-1 50/60 Hz
-2 400 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NO OUTPUT
-AFA 0 to 1 mA
-AHD 4 to 20 mA
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.

12
AC VOLT /
FREQUENCY DUAL FUNCTION
1. FUNCTION
-22 VOLT AND Hz
2. INPUT RATING
-10 150V AC
-20 300V AC
-30 600V AC
3. FREQUENCY
-1 50/60 Hz
-2 400 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
MODEL FORMAT: 2492
Insert model code from the selection below:
MODEL 2492
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4-1/2 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
13
NOTES:
1) WATTS/KILOWATTS/MEGAWATTS AND VARS/KILOVARS/MEGAVARS LEGENDS ARE USER SELECTABLE.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
AC WATT / VAR DUAL FUNCTION
1. FUNCTION/
CONNECTIONS
-40 WATT / VAR 1P2W
-41 WATT / VAR 1P3W
-42 WATT / VAR 3P3W
-43 WATT / VAR 3P4W
(2 1/2 element)
-44 WATT / VAR 3P4W
(3 element)
2. INPUT RATING
-11 120 VOLT / 1 AMP
-15 120 VOLT / 5 AMP
-21 240 VOLT / 1 AMP
-25 240 VOLT / 5 AMP
-31 480V AC / 1 AMP
-35 480V AC / 5 AMP
3. FREQUENCY
-1 50/60 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
-AHF 12 ± 8 mA
MODEL FORMAT: 2492
Insert model code from the selection below:
MODEL 2492
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC

14
NOTES:
1) WATTS/KILOWATTS/MEGAWATTS LEGEND IS USER SELECTABLE.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
AC WATT / POWER FACTOR
DUAL FUNCTION
1. FUNCTION/
CONNECTIONS
-45 WATT / POWER
FACTOR 1P2W
-46 WATT / POWER
FACTOR 1P3W
-47 WATT / POWER
FACTOR 3P3W
-48 WATT / POWER
FACTOR 3P4W
(2 1/2 element)
-49 WATT / POWER
FACTOR 3P4W
(3 element)
2. AC INPUT RATING
-11 120 VOLT / 1 AMP
-15 120 VOLT / 5 AMP
-21 240 VOLT / 1 AMP
-25 240 VOLT / 5 AMP
-31 480V AC / 1 AMP
-35 480V AC / 5 AMP
3. FREQUENCY
-1 50/60 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
-AHF 12 ± 8 mA
MODEL FORMAT: 2492
Insert model code from the selection below:
MODEL 2492
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
15
1. FUNCTION/
CONNECTIONS
-34 WATT / VAR / PF 1P2W
-35 WATT / VAR / PF 1P3W
-36 WATT / VAR / PF 3P3W
-37 WATT / VAR / PF 3P4W
(2 1/2 element)
-38 WATT / VAR / PF 3P4W
(3 element)
2. INPUT RATING
-11 120 VOLT / 1A AC
-15 120 VOLT / 5A AC
-21 240 VOLT / 1A AC
-25 240 VOLT / 5A AC
-31 480V AC / 1 AMP
-35 480V AC / 5 AMP
3. FREQUENCY
-1 50/60 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
MODEL FORMAT: 2493
Insert model code from the selection below:
MODEL 2493
3 in 1 AC WATT / VAR /
POWER FACTOR
NOTES:
1) THESE MODELS HAVE 4 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.

16
3 in 1 AC VOLT OR AMP
MODEL FORMAT: 2493
Insert model code from the selection below:
MODEL 2493
1. FUNCTION
-01 3P3W AC VOLT
-02 3P4W AC VOLT
-05 3 PHASE A, B, C
AC AMP
2. INPUT RATING
-01 1 AMP
-05 5 AMP
-10 150 VOLT
-20 300 VOLT
-30 600 VOLT
3. FREQUENCY
-1 50/60 Hz
-2 400 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
6. AUX. POWER SUPPLY
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
17
3 in 1 AC VOLT / AMP / HERTZ
MODEL FORMAT: 2493
Insert model code from the selection below:
MODEL 2493
1. FUNCTION/
CONNECTIONS
-07 VOLT / AMP / Hz 1P2W
-08 VOLT / AMP / Hz 3P3W
-09 VOLT / AMP / Hz 3P4W
2. INPUT RATING
-51 150 VOLT / 1A AC
-55 150 VOLT / 5A AC
-61 300 VOLT / 1A AC
-65 300 VOLT / 5A AC
-71 600V AC / 1 AMP
-75 600V AC / 5 AMP
3. FREQUENCY
-1 50/60 Hz
-2 400 Hz
5. COMMUNICATION
-1 YCA Protocol
-2 MODBUS
4. ANALOG OUTPUT
-AAA NONE
-AFA 0 to 1 mA
-AHD 4 to 20 mA
6. AUX. POWER
-1 120/240V AC
-3 24V DC
-4 48V DC
-5 125V DC
NOTES:
1) THESE MODELS HAVE 4 DIGIT DISPLAY.
2) NIST CALIBRATION CERTIFICATE AVAILABLE FOR AN ADDITIONAL CHARGE.
3) CERTIFICATE OF CONFORMANCE WITH TEST DATA AVAILABLE FOR AN ADDITIONAL CHARGE.
4) CERTIFICATE OF COMPLIANCE: NO CHARGE, BUT SPECIFY WITH ORDER.

18
Terminal Connections
249111 and 249115 AC Ammeters 249121 AC Voltmeters
249181 and 249183 Frequency Meters 249151 / 249161 / 249171 / 249191
Watts / Vars / P.F. / Phase Angle
249152 / 249162 / 249172 / 249192
Watts / Vars / P.F. / Phase Angle
249153 / 249163 / 249173 / 249193
Watts / Vars / P.F. / Phase Angle
1 PHASE, 2 WIRE
1 PHASE, 3 WIRE 3 PHASE, 3 WIRE
Power Series
Plus
Digital Switchboard Meters

Power SeriesPlus
Digital Switchboard Meters
19
249154 / 249164 / 249174 / 249194
Watts / Vars / P.F. / Phase Angle
249212 / 249213 / 249216 / 249217
Dual function Volts / Amps
249222/249223/249226/249227
Dual function Volts / Hertz
249155/249165/249175/249195
Watts / Vars / P.F. / Phase Angle
249241/249246
Dual function Watts / Vars, Watts / P. F.
249240/249245
Dual function Watts / Vars, Watts / P. F.
3 PHASE, 4 WIRE
(2 1//2 ELEMENT)
1 PHASE, 2 WIRE 1 PHASE, 3 WIRE
3 PHASE, 4 WIRE
(3 ELEMENT)
Terminal Connections

20
249242 / 249247
Watts / Vars and Watts / Power Factor
249244 / 249249
Dual Function Watts / Vars & Watts / P.F.
249243 / 249248
Watts / Vars and Watts / Power Factor
3 PHASE, 3 WIRE 3 PHASE, 4 WIRE
(2 1/2 ELEMENT)
3 PHASE, 4 WIRE
(3 ELEMENT)
DC Volts
249125
Volts DC
Power Series
Plus
Digital Switchboard Meters
Terminal Connections